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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion.
## Primary Indications
* Gastroesophageal reflux disease (GERD)
* Erosive esophagitis
* Healing of duodenal ulcers
* Pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome)
## Adult Dosing
* **GERD/Erosive Esophagitis:** 40 mg orally or IV once daily for up to 8 weeks. Maintenance: 20-40 mg once daily.
* **Duodenal Ulcer Healing:** 40 mg orally or IV once daily for up to 4 weeks.
* **Hypersecretory Conditions:** 40 mg orally or IV twice daily. Doses may be increased based on clinical response. Usual range: 80 mg to 120 mg daily divided twice daily.
## Pediatric Dosing
* **GERD (1 month to 5 years):** 1.1 mg/kg/day orally, divided once or twice daily. Maximum dose: 20 mg/day.
* **GERD (5 to 16 years):** 40 mg orally once daily. For severe erosive esophagitis, 40 mg orally once daily for up to 8 weeks.
* **IV dosing in pediatrics is generally not recommended due to lack of established guidelines and potential for adverse events.**
## Dose Adjustments
No dose adjustment is typically required for renal impairment. For severe hepatic impairment, a dose of 20 mg orally or IV once daily is recommended.
## Contraindications
* Hypersensitivity to pantoprazole, substituted benzimidazoles, or any component of the formulation.
## Adverse Effects
Common: Diarrhea, headache, dizziness, abdominal pain, nausea, flatulence.
Long-term use: Increased risk of *Clostridium difficile*-associated diarrhea, bone fractures (hip, wrist, spine), hypomagnesemia, vitamin B12 deficiency.
## Key Drug Interactions
* **Drugs requiring gastric acid for absorption:** Ketoconazole, itraconazole, posaconazole, iron salts, vitamin B12. Pantoprazole can decrease absorption.
* **Methotrexate:** PPIs may increase methotrexate levels, potentially leading to toxicity.
* **CYP2C19 substrates:** Pantoprazole is a moderate inhibitor of CYP2C19. Monitor for potential additive effects with drugs like clopidogrel.
## Monitoring
* Monitor for signs and symptoms of hypomagnesemia (e.g., tremors, seizures, arrhythmias).
* Monitor for signs of *Clostridium difficile* infection.
* Consider monitoring vitamin B12 levels with long-term therapy.
* Assess for bone fracture risk in patients with prolonged use and risk factors.
## Clinical Pearls
* For oral administration, pantoprazole tablets should be swallowed whole and not chewed or crushed.
* IV administration should be over 15 minutes.
* PPIs are most effective when taken 30-60 minutes before a meal.
* Long-term use of PPIs is associated with increased risks and should be reserved for patients with a clear indication.
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**Disclaimer:** This information is for educational purposes only and does not substitute for professional medical advice. Always consult with a qualified healthcare provider to determine the best treatment for your specific condition and to ensure you have the most up-to-date prescribing information.
